man/tpm2_unseal: correct manpage
man/tpm2_unseal: correct manpage

The manpage had a copy+paste error when porting the
manpages to markdown. Correct this.

Fixes: #670

Signed-off-by: William Roberts <60148e894dabf0b83bde1d460768794cd453c455@intel.com>

martinezjavier/tpm2-tools,martinezjavier/tpm2-tools,01org/tpm2.0-tools,01org/tpm2.0-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools